<template>
  <div :class="className" id="main" :style="{ height: height, width: width }" />
</template>

<script>
import * as echarts from "echarts";

const animationDuration = 2000;

export default {
  props: {
    className: {
      type: String,
      default: "chart"
    },
    width: {
      type: String,
      default: "100%"
    },
    height: {
      type: String,
      default: "300px"
    },
    chartData: {
      type: Object,
      required: true
    }
  },
  data() {
    return {
      chart: null
    };
  },
  mounted() {
    this.$nextTick(() => {
      setTimeout(() => {
        this.initChart();
      }, 80);
    });
  },
  beforeDestroy() {
    if (!this.chart) {
      return;
    }
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    initChart() {
      var chartDom = document.getElementById("main");
      this.chart = echarts.init(chartDom);
      this.setOptions(this.chartData);
    },
    setOptions({ expectedData, date } = {}) {
      this.chart.setOption({
        tooltip: {
          trigger: "axis",
          axisPointer: {
            // 坐标轴指示器，坐标轴触发有效
            type: "shadow" // 默认为直线，可选为：'line' | 'shadow'
          }
        },
        grid: {
          top: 20,
          left: "2%",
          right: "2%",
          bottom: "3%",
          containLabel: true
        },
        xAxis: [
          {
            type: "category",
            data: date,
            axisTick: {
              alignWithLabel: true
            },
            axisLine: {
              show: false,
              textStyle: {
                color: "#7C8CA5"
              }
            },
            axisLabel: {
              textStyle: {
                color: "#7C8CA5"
              }
            }
          }
        ],
        yAxis: [
          {
            type: "value",
            axisTick: {
              show: false
            },
            axisLine: {
              show: false,
              textStyle: {
                color: "#7C8CA5"
              }
            },
            axisLabel: {
              textStyle: {
                color: "#7C8CA5"
              }
            }
          }
        ],
        series: [
          {
            name: "产量",
            type: "bar",
            stack: "vistors",
            barWidth: "30%",
            data: expectedData,
            animationDuration,
            itemStyle: {
              normal: {
                color: "#2297F0",
                barBorderRadius: [20, 20, 0, 0]
              }
            },
            label: {
              normal: {
                show: true, //开启显示
                position: "top", //柱形上方
                textStyle: {
                  //数值样式
                  color: "#2297F0"
                }
              }
            }
          }
        ]
      });
    }
  }
};
</script>
